Although I learned the hard way that if you run it on a Mac home folder, and have iCloud's "optimize Mac storage" turned on, macOS will suddenly try to download literally everything in your iCloud storage to try to count the size of it, probably filling your disk. Oops.
Written in Rust, and it's a `cargo install diskonaut` away if you have the rust toolchain installed.
Can you link to what you're referring?